# US 10,119,180 B2 · Titanium-based intermetallic alloy

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- Number: US 10,119,180 B2
- Document ID: US10119180B2
- Status: Granted
- Kind: B2
- Application number: 15/538,119
- Filed: 2015-12-14
- Published: 2017-11-30
- Granted: 2018-11-06
- Earliest claimed: 2014-12-22
- Assignees: Safran Aircraft Engines
- Applicants: Safran Aircraft Engines
- Inventors: Jean-Yves Guedou; Jean-Michel Patrick Maurice Franchet; Jean-Loup Bernard Victor Strudel; Laurent Germann; Dipankar Banerjee; Vikas Kumar; Tapash Nandy
- Web page: https://patentgrep.com/patent/US10119180B2

## CPC

- C22C 14/00: Alloys based on titanium
- C22F 1/183: {of titanium or alloys based thereon}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)

## Abstract

A titanium-based intermetallic alloy includes, in atomic percent, 16% to 26% Al, 18% to 28% Nb, 0% to 3% of a metal M selected from Mo, W, Hf, and V, 0.1% to 2% of Si, 0% to 2% of Ta, 1% to 4% of Zr, with the condition Fe+Ni≤400 ppm, the balance being Ti, the alloy also presenting an Al/Nb ratio in atomic percent lying in the range 1.05 to 1.15.

## Claims

### Claim 1

A titanium-based intermetallic alloy comprising, in atomic percent, 19.3% to 26% Al, 18% to 24.3% Nb, 0% to 3% of a metal M selected from Mo, W, Hf, and V, 0.1% to 2% of Si, 0% to 2% of Ta, 1% to 4% of Zr, with the condition Fe+Ni≤400 ppm, the balance being Ti, the alloy also presenting an Al/Nb ratio in atomic percent of about 1.07.

### Claim 2 (depends on 1)

An alloy according to claim 1, comprising 20% to 22% Nb, in atomic percent.

### Claim 3 (depends on 1)

An alloy according to claim 1, comprising 23% to 24% Al, in atomic percent.

### Claim 4 (depends on 1)

An alloy according to claim 1, comprising 0.1% to 0.8% Si, in atomic percent.

### Claim 5 (depends on 1)

An alloy according to claim 1 claim 1, comprising 0.8% to 3% of M, in atomic percent.

### Claim 6 (depends on 1)

An alloy according to claim 1, comprising 1% to 3% Zr, in atomic percent.

### Claim 7 (depends on 1)

An intermetallic alloy according to claim 1, wherein:
the content of Al lies in the range 20% to 25%, in atomic percent;
the content of Nb lies in the range 20% to 22%, in atomic percent;
the content of M lies in the range 0.8% to 3%, in atomic percent; and
the content of Zr lies in the range 1% to 3%, in atomic percent.

### Claim 8 (depends on 1)

A turbomachine including a part including an alloy according to claim 1.

### Claim 9 (depends on 8)

An engine including a turbomachine according to claim 8.

### Claim 10 (depends on 9)

An aircraft including an engine according to claim 9.